Air quality index monitor



FIG. 1 is a bottom view of an air quality index monitor, showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a back elevation view thereof;

FIG. 5 is a left side elevation view thereof, the right side elevation view being a mirror image of the left side elevation view;

FIG. 6 is a top front perspective view thereof;

FIG. 7 is a top back perspective view thereof; and,

FIG. 8 is a bottom back perspective view therof.

The broken lines shown in the figures illustrate portions of the air quality index monitor that form no part of the claimed design. 

CLAIM The ornamental design for an air quality index monitor, as shown and described. 